/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Header file for class TUsbIndicatorHandler

*

*/

#ifndef TUSBINDICATORHANDLER_H

#define TUSBINDICATORHANDLER_H

#include <bldvariant.hrh>

#include <usbstates.h>

/**

*  USB indicator handler class for device side.

*

*  This class shows USB indicator when device state changes to Configured, 

*  and hides USB indicator when device leaves Configured state. Suspended 

 * state does not change the indicator.

*

*  @since TB9.2

*/

NONSHARABLE_CLASS( TUsbIndicatorHandler )

    {

public:

    /**

     * Constructor

     */

    TUsbIndicatorHandler();

	/**

     * Set USB indicator (On/Off, maybe more in future) according to 

     * the change of USB device state

     *

     * @param aStateOld previous USB device state

     * @param aStateNew current USB device state

     */

    void HandleDeviceStateChange( TUsbDeviceState aStateOld, 

            TUsbDeviceState aStateNew );

private:

	/**

     * Show USB indicator (On/Off, maybe more in future)

     *

     * @since TB9.2

     * @param aUsbIndicatorState the state of the indicator, 0: OFF, 1: ON

     */

    void ShowUsbIndicator( TInt aUsbIndicatorState );

private:

    /**

     * The device state before suspend.

     * Used to filter out suspend from others;

     */

    TUsbDeviceState iDevStateB4Suspend;

    /////////////////////////////////////////////////////////////////////////

    // Test code

    friend class CtTUsbIndicatorHandler;

    TBool iUsbIndicator; 

    // 

    /////////////////////////////////////////////////////////////////////////

    };

#endif   // TUSBINDICATORHANDLER_H

// End of File